If The sum of two factors of 48 is 19 what are the factors?

A "factor" is an integer that can be divided into another number. For instance, 3 is a factor of 6. All you needed to do was list all the factor pairs of 48, and see which ones add up to 19:

1 x 48

2 x 24

3 x 16

You can stop here, because 3+16=19. Therefore, your two numbers are 3 and 16.